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Energy Efficiency

The final point that the Minister made is particularly important, but let me go back to the main point about the up-front funding costs of installing the energy-efficiency measures. Will he confirm that although those costs will be met through the energy companies, the Government will none the less have to guarantee those costs? Will he confirm that the cost of that guarantee to the public finances could be in the region of £162 billion if every family in the country took up the Prime Minister's offer of the £6,500 limit?